No amount of nationalistic proselytism makes it okay or just "a bit mean" to say:

> A nation of slaves with desperate delusions of grandeur.

> build some toilets or whatever.

It's not just perhaps a bit mean, it's thought-terminating immature racist bullshit when you could have many other better arguments against nationalism in general.

You may be annoyed by the pointless nationalism, it doesn't give you the right to be a racist asshole against it.